Jan
Open-source ChatGPT alternative — 100% local, privacy-first
📋 Overview
Jan is an open-source ChatGPT alternative that runs 100% locally — providing a polished chat interface for any LLM with complete privacy. Unlike Open WebUI (which requires technical setup), Jan provides a one-click installer for Windows, macOS, and Linux — making local AI accessible to non-technical users. It supports any GGUF model, provides model management, and includes a built-in model hub for discovering and downloading models.
✨ Key Features
- •35K+ GitHub stars — open-source ChatGPT alternative
- •One-click installer for Windows, macOS, Linux
- •100% local — complete privacy
- •Built-in model hub
- •GPU acceleration (CUDA, Metal, ROCm)
- •Apache 2.0 licensed
- •Built-in model hub
- •GPU acceleration
🎯 The Problem It Solves
Non-technical users want the ChatGPT experience without sending data to the cloud. Jan provides a polished, privacy-first alternative that runs entirely locally.
🔧 How It Works
Jan provides a one-click installer that sets up a local LLM environment — download models from the built-in hub, select a model, and chat. It supports any GGUF model, provides GPU acceleration (CUDA, Metal, ROCm), and includes conversation history. The interface is clean and intuitive — similar to ChatGPT.
🚀 Installation & Quick Start
Installation
Download from jan.aiQuick Start
- Download Jan
- Select a model
- Chat privately
✅ Pros
- •Best one-click installer
- •100% local
- •Clean interface
- •Apache 2.0 licensed
- •Built-in model hub
- •GPU acceleration
❌ Cons
- •Smaller community than Open WebUI
- •Fewer features
- •Model hub limited
- •Smaller community
💬 Practitioner Verdict
“Jan is the best open-source ChatGPT alternative for non-technical users — the one-click installer is genuinely differentiated. The trade-off: smaller community than Open WebUI, fewer features, and the model hub is limited. For users who want a simple, private ChatGPT alternative, Jan is the default.”
Self-Hosted (Free)
Open source, MIT/Apache licensed. Run it yourself.
⭐ Star & Clone on GitHubFree forever. Your infrastructure, your data.
📊 Specifications
- Language
- TypeScript
- License
- Apache-2.0
- Platform
- Linux, macOS, Windows
- Supported Models
- REST API, CLI
💰 Pricing Reality
100% free Apache 2.0. No paid tier.